Gas-fixture.



PATBNTED JAN. 9, 1906.

P. J. NEVI NS. GAS FIXTURE. APPLICATION FILED FEB.23,1905.

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Specification of Letters Patent.

rammed Jan. 9, 1906.

Application filed February 23, 1905. Serial No. 246,830.

To all whom it may concern:

Be it known that I, PATRICK J. NEVINS, a citizen of the United States,residing at Haverhill, county of Essex, Massachusetts, have inventedcertain new and useful Improvements in Gas-Fixtures; and I do herebydeclare the following to be a full, clear, and ex act description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The invention relates to gas-fixtures, and more especially to suchfixtures as are employed in connection with incandescent lighting bymeans of the Velsbach or other luminous mantles.

The objects in view are to provide for the delivery of the gas in aheated condition at the point where it mixes with the air andincidentally also to protect the ceiling against burning anddiscoloration when the fixture is used indoors.

A further object in view is to provide a simple and effective form ofvalve which will permit the maintenance of a small pilotfiaine when thepressure is not turned on and which will automatically open and supplysuflicient gas to illuminate the mantle when the pressure is turned on.

The invention is illustrated in the accompanying drawings, whereinFigure 1 shows in elevation a fixturehaving a single burner. Fig. 2shows in elevation a similar fixture with double burner.

Fig. 3 is a sectional detail illustrating the construction of the valvewhich is applied to either form.

Referring to these views, a denotes the gassupply pipe, 1) indicates theburner, and c indicates mantles of the WVelsbach or other type. Chimneysd are shown in connection with both forms of fixture. Such chimneys mayor may not be employed, as preferred; but whether employed or not thesupplypipe a immediately above and in line with the mantles is coiledinto the form of a hood or cone, as shown at e, the windings of thecoils being preferably arranged close together, so as to form above andin line with the mantles an overhanging cone, hood, or bell. Asillustrated in the drawings, the windings of the coil are slightlyseparated, so that the overhanging cone impedes, breaks up, anddissipates the rising products of combustion. If preferred, however,these coils may be arranged in actual contact, so as to form animperforate hood or cone which will entirely prevent the direct upwardpassage of those products and deflect them out laterally at the base ofthe cone. 4

As will be understood from the drawings, the gas entering the pipe willtraverse the coils forming the cone or hood and become heated byradiation from the mantle beneath and will be delivered to the burner din a condition most favorable to the thorough intermingling of the samewith the air entering at the usual point under the regulating-cap g. Itwill also be noted that the cone or hood serves to dissipate or break upand deflect the products of combustion arising from the mantle, andthereby protects the ceiling against burning and discoloration.

As illustrated herein, the invention is adapted to be applied to systemswhere the lighting of the mantles is controlled by raising orlowering-the pressure at the central station. If desired, however, thecoiled cone or hood feature may be applied to fixtures where the gas isturned on and oh by hand by means of ordinary stop cocks in theburner-pipes.

In connection with the automatic lighting of the mantles above describedthe con struction of the valves illustrated in Fig. 3 will be employed.As here shown, the pipe a, just below the lower end of the burnerpipeI), is provided with a valve-seat h, and a gravity-valve i, that isshaped to conform to the seat, rests its weight upon it. The weight ofthe valve is suitably proportioned to the pressure of gas in the pipe,so that when full pressure is turned on the valve will be lifted fromits seat so as to permitsuflicient gas to pass to illuminate the mantle,but so also that when the pressure is reduced below the predeterminedpoint the valve will settle upon its seat and close off the main supplyof gas, but will still permit a small amount to pass tion, or passage m,that is formed preferably through the valve between its edge and theseat and forms a pilot-light for the purpose well understood.

Although I have herein shown the invention as applied to incandescentfixtures, it is to be understood that it may also be applied to fixturesemploying an illuminating flame instead of the incandescent mantle. Itwill also be understood that although the valve t is herein shown as agravity-valve it may be held to its seat by a spring, provided suchspring be properly graduated and the presthrough the notch, perfora- IIIO sure applied so as to automatically open and burner, and agas-supply pipe, the latter beclose, as above described. *3: E155; a

The supply-pipe as herein shown is coiled in the form of a cone; butobviously the cone may take the form of an arched hood or dome, orindeed any other form that Will serve to collect and temporarily confinethe heated air for the purpose above described.

Having thus described my inventionpvhat I claim, and desire to secure byLetters Patent is' Iii a gas-fixture, the combination of a ing coiledabove the flame mto the form of a hood or cone closed at the top, forthe purpose of serving as a bell to protect the ceiling against burningand discoloration.

In testimony whereof I affix my signature in presence of two Witnesses.

PATRICK J. NEVINS.

